Teacher who make Physics boring are Criminals - Prof Walter Lewin, MIT
Teacher who make Physics boring are Criminals - Prof Walter Lewin MIT
Prof Lewin (born January 29, 1936) is a Dutch astrophysicist and retired professor of physics at the Massachusetts Institute of Technology.
Lewin earned his doctorate in nuclear physics in 1965 at the Delft University of Technology and was a member of MIT's physics faculty for 43 years beginning in 1966 until his retirement in 2009.
Lewin's contributions in astrophysics include the first discovery of a rotating neutron star through all-sky balloon surveys and research in X-ray detection in investigations through satellites and observatories.
Lewin has received awards for teaching and is known for his lectures on physics and their publication online via YouTube, MIT OpenCourseWare and edX.
In December 2014, MIT revoked Lewin's Professor Emeritus title after an MIT investigation determined that Lewin had violated university policy by sexually harassing an online student in an online MITx course he taught in fall 2013.
Lecture by Walter Lewin - For the love of physics
Kiss of death Experiment -
Principle of the conservation of energy.
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Let’s use a ball swing to see how this works!
At its starting point, all of the swing’s mechanical energy is potential energy. It has no kinetic energy because it’s not moving.
As the swing moves downward, some of its potential energy changes into kinetic energy.
At its bottommost point, the swing’s kinetic energy is at its maximum because it is moving at its fastest speed. Its potential energy is at a minimum because the swing is at its lowest point.
The swing again gains potential energy as it moves upward. At the top of its arc, it once again has zero kinetic energy and maximum potential energy.
Notice that as the swing continues to move, the arcs get smaller. And slower. Eventually it stops.
As the swing moves through the air, friction from the air molecules resist its movement. This changes some of the swing’s kinetic energy into thermal energy, which is transferred to the environment. With less kinetic energy, the swing slows down. When all of its mechanical energy has been converted to thermal energy, the swing stops. It no longer has potential energy or kinetic energy. But the total energy in the system remains the same.
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